US PATENT SUBCLASS 75 / 521
.~.~.~.~.~.~ With Transition metal compound

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
433  DF  .~.~.~ Iron(Fe) {18}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
513  DF  .~.~.~.~.~ In reverberatory furnace (e.g., open-hearth, Siemens-Martin, puddling, etc.) {9}
521.~.~.~.~.~.~ With Transition metal compound {1}
522  DF  .~.~.~.~.~.~.~> Iron oxide

DEFINITION

Classification: 75/521

With Transition metal compound:

(under subclass 513) Process wherein a compound of a Transition metal (i.e., Scandium (Sc), Titanium (Ti), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), NIckel (Ni), Copper (Cu), Zinc (Zn), Yttrium (Y), Zirconium (Zr), Niobium (Nb) or Columbium (Cb), Molybdenum (Mo), Ruthenium (Ru), Rhodium (Rh), Palladium (Pd), Silver (Ag), Cadmium (Cd), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Samarium (Sm), Europium (Eu), Gadolinium (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb), Lutetium (Lu), Hafnium (Hf), Tantalum (Ta), Tungsten (W), Rhenium (Re), Osmium (Os), Iridium (Ir), Platinum (Pt), Gold (Au), and Mercury (Hg)) is present in the reverberatory furnace at any time during the process.

(1) Note. The presence of a Transition metal compound in the furnace lining will be disregarded for purposes of this subclass unless there is a specific disclosure that it interacts in some way with the charge of Iron (Fe).

SEE OR SEARCH THIS CLASS, SUBCLASS:

393+, for a process which employs a Radioactive material whether or not the Radioactive material becomes part of the final product.